Hugh Frederick Harlin was born on July 31, 1935 and lived in rural Morro Bay.
He was last seen on November 1, 1986 at approximately 9:00 a.m. as he was leaving his home. He was supposed to show up at a job site in Cambria later that day but never arrived. A friend reported Harlin missing three days later.
Harlin's truck was found parked along Highway 1 in Cambria. The truck appeared to have had mechanical trouble, according to deputies.
Members of the San Luis Obispo County Sheriff's Search and Rescue team searched the Cambria area for Harlin and any evidence related to his disappearance but were unable to find him.
Harlin's case was featured on the television show "Unsolved Mysteries" in April of 1994.